No Purge Samplers
All groundwater samplers or sampling methodologies attempt to collect a sample that is formation-quality water of the groundwater adjacent to the well. The screened interval, considered in equilibrium with the adjacent groundwater (formation water), can be sampled with passive samplers with little or no well-water agitation, which can alter the contaminant concentrations in the sampled water. No-Purge samplers, which remain submerged during a deployment period, collect from a discrete position within a well a sample of water in ambient equilibrium with adjacent groundwater. No-Purge samplers are relatively easy to use; have no depth limit; and eliminate purge-water production and thus all or most disposal cost.
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